Search-light



(No Model.) A `L ROHRER SEARCH LIGHT.

Patented Nov. 14,1893.

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WITNESSES- @Q Z .ff/f7@ 1HE NATIQNAL Lxmoswumma cnMPANv.

WASHINGTON. u. c.

UNrrnD STATES 'PATENT Ormea.

ALBERT L. ROHRER, LYNN, MASSACHUSETTS, ASSIGN OR TO THE THOMSON- HOUSTON ELECTRIC COMPANY, OF CONNECTICUT.

VsERcH-LlcaHT.

SPECIFICATION forming part of -Letters Patent No. 508,642, dated November 14, 1893. Application filed June 20, 189,2. Serial No. 437,271. (No model.)

lights, and its object is to facilitate the ma.

nipulation of the'lamp, and improve the means for conducting the electric current thereto.

The lamp is so mounted as to have entire freedom of revolution in both horizontal and vertical planes, the motion being effected preferably by endless belts and suitable driv- 1 ing mechanism. The electric connections are made through sliding contacts which permit the continuous rotation of the lamp in either direction.

In the drawings, Figure l is a sectional side elevation. Fig. 2 shows the driving mechanism, and Figs. 3, 4, and 5 are details.

The search light is mounted on any suit-Y able support, such as the pilot house of a Vessel, indicated in dotted lines in Fig. l. A stationary base plate A affords a support for a rotatable foot B which carries pedestals S in which the lamp L is mounted. The base plate also contains a bearing@ in which is journaled a hub D, which may be either secured to or formed integral with the foot B and carries on its lower end a horizontalpulley W2. A belt B2 passes around this pulley and is led over suitable supporting sheaves W4 to a drum or axle G, located at any convenient point, as for instance in the pilot house, as shown. By means of suitable gearing, as W6, P, and a crank K, the lamp can be rotated in a horizontal plane. g

Journaled in the hub D is a shaft R, the lower end of which may bestepped in a bearing h, or otherwise supported. The shaft caries a miter gear W9, meshing with a similar gear W8 on a short horizontal shaft R' journaled in bearings carried by the foot B and having secured to its outer end a sprocket wheel W. Achain belt C passes around this wheel and over a similar wheel W, secured upon one of the trunnions by which the lamp L is hung on a horizontal axis in the pedestals S. Motion is communicated to the shaft R by means of a pulley W3 secured thereto, and a belt B', running over sheaves W5 to a drum G', which is drivenby gearing W7 P and a crank K. By these means the lamp can be rotated in a vertical plane.

The electrical connections to the lamp are made through two contact rings O, O arranged concentrically on its foot from which rings leads are taken up through the hollow pedestals S of the lamp, as shown. Fig. 5 shows the connection at the upper part of the pedestal to the lamp as heretofore used, that 1s, a flexible cable E passes out through an opening near the top of the pedestal or standard and through an opening in the shell of the lamp, sufficient slack being allowed for a complete revolution of the lamp, or more.

An improved mode of conveying the current to the lamp is shown in Fig. 4. In this case the lead wire passes through a hollow shaft Q about which the lamp revolves, and terminates in a metal cap or contact O2 in frictional contact with which is one of the lamp wires, the other Wire, bearing correspondingly on the other pole of the circuit on the oppdsite side of the lamp. This connection allows the lamp to be revolved continuously in one direction in both a vertical and horizontal plane. lampto be rotated continuously in a horizontal plane but only back and forth through a complete revolution in a vertical plane.

What I claim as new, and desire to secure by LettersY Patent, is-

1. The combination with the stationary base A, of the foot B mounted rotatably thereon and carrying the pedestals S, the drum L .hung on trunnions in said pedestals, the shaft R journaled in the hub D of the foot, and geared to one of the trunnions of the drum, the pulleys W2, W3 secured respectively on the hub and shaft, the separate drums G, G located near each other at adistance, and

The connection Fig. 5, allows the nating in a cap, with which the lamp Wire has frctionzrl contact, substantially as described. 1o

In Witness whereof I have hereto set my hand this 18th day of June, 1892.

ALBERT L. ROHRER. Witnesses:

JOHN W. GIBBONEY, DUGALD MCKILLOP. 

